Weight input
Enter any weight.
Type into any field — kilograms, pounds, or stone and pounds — and the others update instantly.
Stone & Pounds (st & lb)
Formula
1 stone = 14 pounds = 6.350 kg · 1 kg = 2.205 lb · 1 lb = 0.4536 kg
Health
Stone Weight Calculator
Convert weight between kilograms, pounds, and stone & pounds instantly. Type into any field and the others update live.
kglbstoneinstant
All conversions
Your weight, every way.
See your weight in stone & pounds, total pounds, and kilograms — all at a glance.
Enter a weight above to see all conversions.
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About this calculator
Method, formulas, and limits.What this does
Converts weight between kilograms, pounds, and the British stone & pounds format in real time as you type in any field.
Who it is for
Anyone in the UK or Ireland who uses stone for body weight, fitness enthusiasts tracking progress across unit systems, and travelers or health professionals who need quick kg/lb conversions.
How it works
Type into any of the four fields (kilograms, pounds, stone, remaining pounds). The calculator converts using exact constants (1 stone = 14 lb = 6.35029318 kg) and updates all other fields instantly, rounded to one decimal place.
Limitations
Simple unit conversion only — no BMI, body-fat, or other health metrics. Rounding to one decimal place is applied to displayed values.
Key calculations
- 1 stone
- 1 stone = 14 pounds = 6.35029318 kg
- Kilograms to pounds
- lb = kg × 2.20462262
- Pounds to kilograms
- kg = lb × 0.45359237
Reference ranges
- Common Conversions
- 75 kg = 165.3 lb = 11 st 11.3 lb. 70 kg = 154.3 lb = 11 st 0.3 lb. 90 kg = 198.4 lb = 14 st 2.4 lb.
- UK Body Weight
- British adults typically report weight in stone and pounds. 12 st = 76.2 kg, 13 st = 82.6 kg, 14 st = 88.9 kg.
- Unit Precision
- One stone is exactly 6.35029318 kg. Values display rounded to one decimal place for readability.
How to use it
- 1.Type a weightEnter a value into any field — kilograms, pounds, or stone and pounds.
- 2.Watch the conversionAll other fields update instantly with the converted values.
- 3.Mix stone and poundsFor stone & pounds, enter the whole stones and the remaining pounds separately.
There are 14 pounds in one stone. This is the traditional British unit for body weight.
Divide the weight in kilograms by 6.35029318 to get the weight in stone. For example, 75 kg ÷ 6.35029318 = 11.81 stone, which is 11 stone 11.3 pounds.
The stone is primarily used in the UK and Ireland for body weight. Most other countries use kilograms, and the US uses pounds.
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